bates



STATES PATENT OFFIC.

N. R. BATES, OF NEW' YORK, N. Y.

STUFFINGr-BOX.

Speccaton of Letters Patent No. 17,188, dated May 5, 1857.

To all whom t may concern:

Be it known that I, N. R. Barns, of the city, county, and State of New York, have invented a new and useful Improvement in Stuffing-Boxes; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a vertical section of a force pump with my improvement applied to it. Fig. 2 is a detached enlarged vertical section of my improvement. Fig. 3 is a detached plan or top view of the same; the top plate being removed.

Similar letters of reference indicate corresponding parts in each of the several figures.

This invention relates to an improved stufling box, wherein the packing may be adjusted or pressed around the plunger or the plunger rod, in cases where the usual stuffing boxes could not be well applied or rendered accessible without removing parts which would be attended with considerable trouble and delay.

The invention consists in having a .box with a thin annular plate placed in it; said plate encompassing the plunger, piston, or

plunger-rod, and having said plate encompassed byl annular rods, which are connected to screw rods passing through the sides of the box. The outer ends of the screw rods have each a nut upon them; the packing being interposed between the plunger and annular plate as will be hereinafter shown and described, so that by turning the nuts on the ends of the screw-rods, the annular plate may be contracted and the packing compressed snugly around the plunger or plunger-rod.

To enable those skilled Vin the art to fully understand and construct my invention, I will proceed to describe it.

A, Fig. l, represents the outer cylinder of a force pump; B, is the inner cylinder; a space being allowed between the two cylinders.

C represents a plunger, which works in the inner cylinder B. 0n the upper end of the cylinder B, a box D is formed; and E is a plate which is secured to the upper part of the box, and forms the top plate thereof; the plunger C passing through a. circular opening in the top plate.

F represents a metal plate, which is bent in annular form andencompasses the plunger C. The ends of the plate F are not connected, but merely overlap Aeach other, as shown at (ax), and the plate F forms a ring of sufficient size to allow a requisite quant-ity of packing G to be interposed between the plate F and plunger G.

H, ITI, represent two rods which are placed around the plate F. These rods pass through the eyes (a) of screw-bolts I, I, passing through the sides ofthe box D, at opposite sides of the plate F. On the outer end of each rod I, a nut J is fitted.

From the above description of parts, it will be seen that by drawing the screw-rods I, I, outward, by turning the nuts J, the rods H, I-I, will contract the plate F, and the packing G will be pressed snugly around the plunger C.

This improvement may be advantageously employed in cases where the ordinary studing-boxes cannot be applied, such as the internal cylinders of force pumps, &c.,where the usual stuffing boxes could not well be adjusted without removing certain parts which would be attended with Considerable difficulty and expenditure of time.

In my improvementthe screw-rods I, I, may, when necessary, pass through the sides of the external cylinder, so that the packing may be pressed around the plunger without removing any parts, and without any inconvenience whatever.

The usual stuffing boxes, as is well known are formed of a conical plunger fitted within a corresponding shaped chamber; the plunger being forced down upon the packing by screws. This box is quite complicated and is much more troublesome to operate or adjust than mine, and it cannot be applied to internal cylinders.

I do not claim constructing ofa stutiing box for the purpose of allowing a lateral motion to the piston, as that has been done before, but l What I do claim as new and my own invention and desire to secure by Letters Pat- N. R. BATES.

IVitnesses:

H. TUsoH, J. W. CooMBs. 

